45 is believed that this probably arose from microorganisms which happened to be in the seawater at the time. There was an extremely high content of Neptunium in the activity. Two thirds was mentioned, and a few minutes ago as much as 80 per cent of the activity at the beginning being in the form of Neptunium. Consequently, most of the burns were probably due to soft betas, most likely from the Neptunium. Alderson Reporting Company Washington, D. C NRDL observed that most of the activity was ARC 10 concentrated on the smaller particles with approximately an 11 equal distribution of hard and medium gamma components, 12 small amount of soft components. a - At New York, the laboratory observed as much as 18 13 14 per cent of ruthinium in this activity. 15 cent of 16 Neptunium and 18 per cent of ruthiniun, 17 much of anything left. the fission products, That would be 18 per I would judge, because between there would not be 18 NRDL has cdserved activity in the fish caught in 19 the Rongelap lagoon, and at 116 days there was 35 per cent 20 of total beta activity in the fish as ruthinium. 21 I might put a few of these figures on the board. 29 There were 2.7 microcuries of beta activity to fish of two 23 to three pounts, 24 fish. and 6.4 microcuries of gamma in the same This was approximately equally distributed among the “25.r“¥iscera, the skeleton,the flesh. Deparimey 2: “. plistariv > os ~ ADDE yy Pires oa is Lo